Ans. This is a very valid and common Google Analytics interview question. – a funnel is a series of web pages, like a navigation path that your visitors need to go through in order to meet the goals of the website. Essentially, it comprises one goal which is a webpage, and one or more funnel pages.
It helps identify where users start and end their buying process. Based on this one can remove the blockages in the conversion process. There is a limit of 20 funnel pages in Google Analytics.